I see that hplovecraft.com has recently

Created a series of pages showcasing several Lovecraft-Related Documents including his birth, marriage, and death certificates.

And talking of old documents, Brown University Library (i.e. the John Hay Library) is open again to students and visitors, with masks optional…

Spring 2023: Welcome back to your Brown University Library!

This is pinned on their blog, so I assume the Library has been closed until recently due to Covid? Presumably this re-opening means the 2023 S.T. Joshi Endowed Research Fellowship in H.P. Lovecraft fellow will now be able to lovingly sniff Lovecraft’s letters in person. Currently…

Applications for the next cycle of fellowships will open in Spring 2024.